135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/* net/atm/addr.c - Local ATM address registry */
|
|
|
|
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
|
|
|
|
#include <linux/atm.h>
|
|
#include <linux/atmdev.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include "signaling.h"
|
|
#include "addr.h"
|
|
|
|
static int check_addr(struct sockaddr_atmsvc *addr)
|
|
{
|
|
int i;
|
|
|
|
if (addr->sas_family != AF_ATMSVC)
|
|
return -EAFNOSUPPORT;
|
|
if (!*addr->sas_addr.pub)
|
|
return *addr->sas_addr.prv ? 0 : -EINVAL;
|
|
for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
|
|
if (!addr->sas_addr.pub[i])
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int identical(struct sockaddr_atmsvc *a, struct sockaddr_atmsvc *b)
|
|
{
|
|
if (*a->sas_addr.prv)
|
|
if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
|
|
return 0;
|
|
if (!*a->sas_addr.pub)
|
|
return !*b->sas_addr.pub;
|
|
if (!*b->sas_addr.pub)
|
|
return 0;
|
|
return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
|
|
}
|
|
|
|
static void notify_sigd(struct atm_dev *dev)
|
|
{
|
|
struct sockaddr_atmpvc pvc;
|
|
|
|
pvc.sap_addr.itf = dev->number;
|
|
sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
|
|
}
|
|
|
|
void atm_reset_addr(struct atm_dev *dev)
|
|
{
|
|
unsigned long flags;
|
|
struct atm_dev_addr *this, *p;
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
list_for_each_entry_safe(this, p, &dev->local, entry)
|
|
kfree(this);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
notify_sigd(dev);
|
|
}
|
|
|
|
int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
|
|
{
|
|
unsigned long flags;
|
|
struct atm_dev_addr *this;
|
|
int error;
|
|
|
|
error = check_addr(addr);
|
|
if (error)
|
|
return error;
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
list_for_each_entry(this, &dev->local, entry) {
|
|
if (identical(&this->addr, addr)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -EEXIST;
|
|
}
|
|
}
|
|
this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
|
|
if (!this) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
this->addr = *addr;
|
|
list_add(&this->entry, &dev->local);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
notify_sigd(dev);
|
|
return 0;
|
|
}
|
|
|
|
int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
|
|
{
|
|
unsigned long flags;
|
|
struct atm_dev_addr *this;
|
|
int error;
|
|
|
|
error = check_addr(addr);
|
|
if (error)
|
|
return error;
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
list_for_each_entry(this, &dev->local, entry) {
|
|
if (identical(&this->addr, addr)) {
|
|
list_del(&this->entry);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
kfree(this);
|
|
notify_sigd(dev);
|
|
return 0;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -ENOENT;
|
|
}
|
|
|
|
int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
|
|
size_t size)
|
|
{
|
|
unsigned long flags;
|
|
struct atm_dev_addr *this;
|
|
int total = 0, error;
|
|
struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
list_for_each_entry(this, &dev->local, entry)
|
|
total += sizeof(struct sockaddr_atmsvc);
|
|
tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
|
|
if (!tmp_buf) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -ENOMEM;
|
|
}
|
|
list_for_each_entry(this, &dev->local, entry)
|
|
memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
error = total > size ? -E2BIG : total;
|
|
if (copy_to_user(buf, tmp_buf, total < size ? total : size))
|
|
error = -EFAULT;
|
|
kfree(tmp_buf);
|
|
return error;
|
|
}
|